2 # This is a simple wrapper Makefile that calls the main Makefile.perf
3 # with a -j option to do parallel builds
5 # If you want to invoke the perf build in some non-standard way then
6 # you can use the 'make -f Makefile.perf' method to invoke it.
10 # Clear out the built-in rules GNU make defines by default (such as .o targets),
11 # so that we pass through all targets to Makefile.perf:
16 # We don't want to pass along options like -j:
21 # Do a parallel build with multiple jobs, based on the number of CPUs online
22 # in this system: 'make -j8' on a 8-CPU system, etc.
24 # (To override it, run 'make JOBS=1' and similar.)
27 JOBS := $(shell grep -c ^processor /proc/cpuinfo 2>/dev/null)
34 # Only pass canonical directory names as the output directory:
37 FULL_O := $(shell readlink -f $(O) || echo $(O))
41 # Only accept the 'DEBUG' variable from the command line:
43 ifeq ("$(origin DEBUG)", "command line")
47 SET_DEBUG = "DEBUG=$(DEBUG)"
54 @printf ' BUILD: Doing '\''make \033[33m-j'$(JOBS)'\033[m'\'' parallel build\n'
58 @$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@
62 # Needed if no target specified:
69 # The clean target is not really parallel, don't print the jobs info:
75 # All other targets get passed through: